From £17,556
Experienced extension builder ready to quote for your work. Oakridge Construction Limited is the best extension builder in SG14. No obligation free...
From £17,692
Herts Loft Ltd is an established extension buildering business in SG14. We come highly recommended and provide competitive quotes for your work.
From £17,500
Need to find an Extension Builder near you for all your extension buildering work?
J B R Contracts provides a local, trusted extension buil...
From £17,900
Trusted and professional extension builder in SG14. Experienced in all extension buildering work and keeping within budget and on quote. Aspect Con...
From £17,548
At Unico Developers LTD, we offer quality services from small projects up to new builds for all clients at reasonable prices. Our courteous Constru...
From £17,956
Relax... you have found a reliable extension builder in SG14. Up and Out Builds Ltd is a friendly and reliable company based in SG14 who consider n...
From £17,732
Absolute Building & Carpentry is an established and experienced local extension builder in SG14. Please contact us for a free, no obligation quote ...
From £17,772
Landmark General Builders Ltd are here to help customers who need an Extension Builder in SG14. We offer a competitive rate to complete all your ex...
From £17,732
Need an Extension Builder in SG14? JK Character Construction Ltd has been helping local clients (20 mile radius) with their extension buildering jo...
From £17,684
Trusted and professional extension builder in SG14. Experienced in all extension buildering work and keeping within budget and on quote. Chelsfield...

Underpinning ranges from £17,500 (J B R Contracts based in SG14) to £17,956 (Up and Out Builds Ltd based in SG12), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in SG14 by posting a job with HaMuch and we will send it to extension builders in SG14.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Hertford | £46 | £289 |
| Underpin A Building near Ware | £47 | £296 |
| Underpin A Building near Welwyn Garden City | £42 | £268 |
| Underpin A Building near Hoddesdon | £46 | £296 |
| Underpin A Building near East Hertfordshire | £44 | £289 |
| Underpin A Building near Hatfield | £64 | £283 |
| Underpin A Building near Cheshunt | £48 | £285 |
| Underpin A Building near Potters Bar | £43 | £273 |
| Underpin A Building near Stevenage | £44 | £282 |
| Underpin A Building near Harlow | £43 | £288 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,707

Two storey extension - £88,311

Build a timber frame extension - £26,207

Build a swimming pool - £81,207

Single storey extension - £59,144

Side return extension - £43,831

Install an RSJ - £2,407

Outbuilding - £10,207

Build a Mansard loft conversion - £52,207

Loft conversion - £35,693

Build a kitchen extension - £42,207

Hip to gable loft conversion - £42,207

Granny annexe - £87,207

Garden office - £10,207

Convert a Garage - £16,207

Garage - £18,707

Build a flat roof extension - £22,207

Build a dormer loft conversion - £42,207

Concrete foundations - £6,457

Convert a bungalow loft - £29,207

Convert a basement - £39,831